Hot-air pipe.



PATENTED OCT. 18. 19031.

s. --E. ELLIS.

. HOT AIR PIPE.

WITNEBBEg No. 741,318. PATENTED 00113, 1903 s. E. ELLIS.

HOT AIR. PIPE.

APPLICATION FILED MAR. 27, 1902.

2 SHEETS-SHEET 2.,

. N0 MODEL.

I N VE N T R cmmml 111m, :1

NIIED STATES rammed October 13, 1903.

HOT "AIR PIPE.

SPECIFICATION forming part of Letters Patent No. 741,318, dated October 13, 1903. Application filed March 27, 1902. Serial No. 100,342. (No model.)

To ctZZ whom it may concern:

Be it known that I, SAMUEL E. ELLIS, a citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Hot-Air Pipes; andI do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention pertains to a hot-air pipe for heating and ventilating.

The object of the invention is to provide a simplified form of construction for double hot-air pipes used for furnace-heating.

Another object is to provide means for taking the air for the air-spaces of the pipe from above the first floor instead of from the basement, whereby the air carried up to the top of the building may be kept free of dust, smoke, gases, and the like, all of which will be more fully and clearly set forth in the following specification, aided by the accompanying drawings.

In addition to the above the invention relates to certain details of construction to be pointed out in the claims herein.

In the drawings, Figure 1 is a perspective view of the two lowermost sections of the hotair pipe, showing the same separated and located within a wall and also showing an open ing through the base-board in one of the rooms. Fig. 1 is a transverse section of the pipe, showing an opening in the outer casing and a ventilating-tube connected therewith through the said base-board. Fig. 2 is a perspective View of a section of the pipe, show I with other pipes of this class, is composed of an inner and an outer casing A and B, respectively. The said inner portion is composed of a single sheet of metal of the form shown in Figs. 2 and 3, with vertical sides and ends. At the bottom is a flange 0, formed on all sides by slitting the corners and bonding the metal outward at right angles to the vertical sides. Flanges are also formed at the top of thesection and are indicated by the letter D. They are bent out parallel with the lower flanges O and have upturned lips D, which are parallel with the sides of the pipe. The flanges at the sides at both top. and bottom are perforated, as at E and F, whereby the air is permitted to ascend through them between the two casings. Evidently the end portions may be likewise perforated; but this is not ordinarily done. The

outer casing B is constructed as shown in the figures and is of a single piece, being Sllfficiently large to receive the part A. Near the bottom of this portion the metal is contracted, as shown at G, and is then bent inward at H horizontally and then up into a lip I parallel with said portion G. The said lip is not formed, however, until the portion A is set within B. Then the lips 0 rest upon the horizontal parts H, the latter being perforated to correspond with the apertures E and F. When so placed and held by the said lip I, the top edge of the outer part B is turned over upon the lips D, as shown in Figs. 1 and 2. By the last-named operation the pipe is completed and then appears as in Figs. 1 and 2. It will be seen that two sections may be coupled together by inserting the lower contracted end of one into the upper end of the other. Fig. 1 will show the idea of this. Each section has a contracted bottom, as described, sufliciently small to fit snugly Within the next section below, whereby the pipe may be built to any desired height, the apertures E and F completing the air-space from bottom to top, so that the airis free to circulate through the entire series of sections.

The bottom of the lower section, as shown at J, Figs. 1 and 1, is closed, being without perforations. This, as stated in the objects, is to prevent dust, smoke, and gases from being drawn up through the pipe and deposited into the rooms above. In my improved device I attach the pipe from the dome of the furnace to the lower section, as usual, but

provide an opening in the outer pipe B at K,

Fig. 1, which is also indicated by dotted lines at L, Fig. 1. This opening is above the floor M, and a hole N is cut through the base-board O and connected by a tube P. No other open are delivered into the rooms, causing much annoyance, all of which has been avoided by my construction. My pipe is of much value by reason of its simple construction and ease of putting t0-,

gether,and hence its cheapness, because made of two pieces.

I do not wish to confine myself to the exact arrangement shown, as changes may be made therein Without departing from the spirit or intent of the invention. As an instance of what the sechanges may consist of I show in Fig. 5 a slightly-modified form of these portions of the section which are placed together for interlocking purposes. An inner lip Q is formed with the horizontal portion D, which extends upward past thejoint formed between the sections, all of which will be readily understood. This lip is formed merely by lapping the metal over upon itself, as shown in the figure named.

I claim- 1. A hot-air pipe consisting of two portions, an inner and an outer, the said inner portion having its topedges at both sides and ends bent outward horizontally and then upward vertically there being a series of apertures in the said horizontal portionat the sides, the bottom edge of said inner portion being bent outward horizontally there being a series of 0 apertures therethrough, the said outer portion lying against the upturned edge of the inner portion and against the lower outturned, the top edge of said outer portion being turned over upon the said upturned edge and the lower edge bent under the lower outturned edge and then up inside the inner pipe portion the same having apertures corresponding with those in the lower outturned portion of the inner pipe, said outer portion being contracted at its bottom substantially as set forth and for the purposes described.

2. In a hot-air-pipe section the inner portion A of rectangular form, the bends D at right angles to A around the top edge, the same having perforations therein, the upturned portions D formed with said bends D parallel with the body of A, and the rightangled bond 0 on the bottom edge of A, there being perforations therein, said bends C and D being parallel, in combination with the outer portion B to conform with A and having the inturned bend H at its bottom at right angles to the walls of said portion B to receive the bend 0, there being perforations in H to correspond with those in O, the upturned portion I parallel with B and inclosing the bottom of A, the bottom of B being contracted at G for the purposes described, and the overturned top edge of B for engaging the bend D of A all as set forth.

In testimony whereof I affix my signature in presence-of two witnesses.

SAMUEL E. ELLIS.

Witnesses:

E. J. ABERSOL, A. KEITHLEY. 

